minixml创建与解析XML

转自: http://blog.sina.com.cn/s/blog_4ab2ba570100iria.html

以下是对minixml分析后做出的例子。希望对大家有用。至于minixml库，大家可google查找。

 <?xml version="1.0" ?> 

 <schedule>

       <record>

              <program_content>....1.</program_content> 

              <from>.....2...</from> 

              <to>.....3..</to> 

              <mode>....4.</mode> 

              <frequency>...5.</frequency> 

              <pre_set_from>......</pre_set_from> 

     </record>

     <record>

             <program_content>...7..</program_content> 

             <from>....8....</from> 

             <to>-------</to> 

             <mode>-----</mode> 

             <frequency>-----</frequency> 

             <pre_set_from>-----</pre_set_from> 

     </record>

     <space>

           <FHD>-----</FHD> 

           <SHD>-----</SHD> 

           <MAC>-----</MAC> 

     </space>

</schedule>

#include"mxml.h"

#inclide<string.h>

#include<stdlib.h>

#include<stdio.h>

const char *

whitespace_cb(mxml_node_t *node,

              int         where)

{

mxml_node_t *parent;

int level;

const char *name;

static const char *tabs = "\t\t\t\t\t\t\t\t";

name = node->value.element.name;

if (!strcmp(name, "schedule") || !strcmp(name, "record") || !strcmp(name, "space"))

{

if (!strcmp(name, "schedule")||where == MXML_WS_BEFORE_OPEN || where == MXML_WS_AFTER_CLOSE)

return("\n");

else(!strcmp(name, "record") || !strcmp(name, "space") ||where == MXML_WS_BEFORE_OPEN)

return("\t");

else(!strcmp(name, "record") || !strcmp(name, "space") ||where == MXML_WS_AFTER_CLOSE)

return("\n");

}

else if (!strcmp(name, "dd") || !strcmp(name, "dt") || !strcmp(name, "li"))

{

if (where == MXML_WS_BEFORE_OPEN)

return ("\t");

else if (where == MXML_WS_AFTER_CLOSE)

return ("\n");

}

else if (!strncmp(name, "?xml", 4))

{

if (where == MXML_WS_AFTER_OPEN)

return ("\n");

else

return (NULL);

}

else if (where == MXML_WS_BEFORE_OPEN ||

((!strcmp(name, "choice") || !strcmp(name, "option")) &&

where == MXML_WS_BEFORE_CLOSE))

{

for (level = -1, parent = node->parent;

parent;level ++, parent = parent->parent);

if (level > 8)

level = 8;

else if (level < 0)

level = 0;

return (tabs + 8 - level);

}

else if (where == MXML_WS_AFTER_CLOSE ||

((!strcmp(name, "group") || !strcmp(name, "option") ||

!strcmp(name, "choice")) &&

where == MXML_WS_AFTER_OPEN))

return ("\n");

else if (where == MXML_WS_AFTER_OPEN && !node->child)

return ("\n");

return (NULL);

}

int main()

{

    mxml_node_t *xml;    

    mxml_node_t *schedule;  

    mxml_node_t *record;  

    mxml_node_t *space;  

    mxml_node_t *node;

    xml = mxmlNewXML("1.0");

    schedule = mxmlNewElement(xml, "schedule");

for(i=0;i<2;i++)

{

        record = mxmlNewElement(schedule, "record");

            node = mxmlNewElement(record, "program_content");

            mxmlNewText(node, 0, "val4");

            node = mxmlNewElement(record, "from");

            mxmlNewText(node, 0, "val5");

            node = mxmlNewElement(record, "to");

            mxmlNewText(node, 0, "val6");

            node = mxmlNewElement(record, "mode");

            mxmlNewText(node, 0, "val6");

            node = mxmlNewElement(record, "frequency");

            mxmlNewText(node, 0, "val6");

            node = mxmlNewElement(record, "pre_set_from");

            mxmlNewText(node, 0, "val6");

}

       space = mxmlNewElement(schedule, "space");

            node = mxmlNewElement(space, "FHD");

            mxmlNewText(node, 0, "val4");

            node = mxmlNewElement(space, "SHD");

            mxmlNewText(node, 0, "val5");

            node = mxmlNewElement(space, "MAC");

            mxmlNewText(node, 0, mac_address());

            

            FILE *fp;

            fp = fopen("filename.xml", "w");

            mxmlSaveFile(xml, fp,whitespace_cb );

            fclose(fp);

            mxmlDelete(xml);

}

///////////////// ///////////////////////

////////////////////////////////////////////

parse XML example

  <?xml version="1.0" encoding="gb2312" ?> 

 <note>

  <id>5000</id> 

  <password>FE-D0-18-00</password> 

</note>

#include"mxml.h"

#include<string.h>

#include<stdio.h>

#include<stdlib.h>

int main()

{

    FILE *fp;

    mxml_node_t *tree,node;

    fp = fopen("filename.xml", "r");

    tree = mxmlLoadFile(NULL, fp,MXML_TEXT_CALLBACK);

    fclose(fp);

    mxml_node_t *id,*password;

    

    node = mxmlFindElement(tree, tree, "note",

                           NULL, NULL,

                           MXML_DESCEND);

    id = mxmlFindElement(node, tree, "id",

                           NULL, NULL,

                           MXML_NO_DESCEND);

    printf("[%s}\n",id->child->value.text.string); 

    

    password = mxmlFindElement(node, tree, "password",

                           NULL, NULL,

                           MXML_NO_DESCEND);                          

     printf("[%s]\n",password->child->value.text.string);

  

    mxmlDelete(tree);

}